19. What kind of polygon is shown below?
D. octagon
B. pentagon
C. hexagon
A heptagon
20. Which figure is congruent to the figure inside the box?
C.
D.
A.
B.
21. It is a set of all points in a plane with the same distance from a center point?
C. radius
D. diameter
A. chord
B. circle
22. Which of the following is not a regular polygon?
Σ
A
C.
D.
A.
B.
23. Which of the following is a regular polygon?
D.
C.
A.
B.
les is called​